US7210553B2 - Steering apparatus - Google Patents

Steering apparatus Download PDF

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Publication number
US7210553B2
US7210553B2 US11/077,457 US7745705A US7210553B2 US 7210553 B2 US7210553 B2 US 7210553B2 US 7745705 A US7745705 A US 7745705A US 7210553 B2 US7210553 B2 US 7210553B2
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US
United States
Prior art keywords
steerable vehicle
rack
end portion
wheel
steering wheel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related, expires
Application number
US11/077,457
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US20060201735A1 (en
Inventor
Daniel E. Williams
Bob Johnson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZF Active Safety and Electronics US LLC
Original Assignee
TRW Automotive US LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TRW Automotive US LLC filed Critical TRW Automotive US LLC
Priority to US11/077,457 priority Critical patent/US7210553B2/en
Assigned to TRW AUTOMOTIVE U.S. LLC reassignment TRW AUTOMOTIVE U.S. LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WILLIAM, DANIEL E., JOHNSON, BOB
Priority to DE102005059513A priority patent/DE102005059513A1/en
Publication of US20060201735A1 publication Critical patent/US20060201735A1/en
Application granted granted Critical
Publication of US7210553B2 publication Critical patent/US7210553B2/en
Adjusted expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D3/00—Steering gears
    • B62D3/02—Steering gears mechanical
    • B62D3/12—Steering gears mechanical of rack-and-pinion type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • B62D5/10—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by type of power unit
    • B62D5/12—Piston and cylinder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D7/00—Steering linkage; Stub axles or their mountings
    • B62D7/06—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins
    • B62D7/08—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins the pivotal axes being situated in a single plane transverse to the longitudinal centre line of the vehicle
    • B62D7/10—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins the pivotal axes being situated in a single plane transverse to the longitudinal centre line of the vehicle with single-output steering gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D7/00—Steering linkage; Stub axles or their mountings
    • B62D7/20—Links, e.g. track rods

Definitions

  • the present invention relates to a new and improved apparatus for turning steerable vehicle wheels upon manual rotation of a steering wheel.
  • the rack and pinion steering system may include a hydraulic motor which is connected with the steerable vehicle wheels by tie rods in the manner disclosed in U.S. Pat. No. 3,709,099.
  • Other known rack and pinion steering systems are disclosed in U.S. Pat. Nos. 5,851,015 and 5,975,573.
  • Steerable vehicle wheels have also been turned by steer-by-wire steering systems.
  • a known steer-by-wire steering system there has been no mechanical connection between a steering wheel and a steering apparatus connected with steerable vehicle wheels.
  • a transmitter assembly associated with the steering wheel sends a signal to a receiver assembly associated with a steering apparatus connected with the steerable vehicle wheels. This steering apparatus is actuated in accordance with the signal received by the receiver assembly.
  • Known steer-by-wire steering systems are disclosed in U.S. Pat. Nos. 6,546,322 and 6,655,709.
  • the present invention relates to a new and improved apparatus for use in turning steerable vehicle wheels upon manual rotation of a steering wheel.
  • the apparatus includes a connector member which connects a first end portion of a rack with a first steerable vehicle wheel.
  • a second end portion of the rack is spaced from a second steerable vehicle wheel and is free of connection with a member which extends between the second end portion of the rack and the second steerable vehicle wheel.
  • a force transmitting member has first and second end portions connected with the steerable vehicle wheels.
  • a hydraulic motor is connected with the force transmitting member.
  • a valve is actuated.
  • the valve is connected with a pinion gear which is disposed in meshing engagement with the rack. Actuation of the valve effects operation of a hydraulic motor connected with the force transmitting member to turn the steerable vehicle wheels.
  • a steering apparatus constructed in accordance with the present invention may be used in a steer-by-wire steering system.
  • the steering apparatus may be used in other systems.
  • a steering apparatus constructed in accordance with the present invention may be used in a steering system in which there is a mechanical connection between the steering wheel and the steering apparatus.
  • FIG. 1 is a schematic pictorial illustration of a portion of a vehicle having a steering apparatus constructed in accordance with the present invention.
  • FIG. 2 is a schematic top plan view of the steering apparatus of FIG. 1 .
  • a steering apparatus 10 ( FIGS. 1 and 2 ) is operable to turn steerable front wheels 12 and 14 of a vehicle.
  • the illustrated steering apparatus 10 is a steer-by-wire steering system. Therefore, the steering apparatus 10 is free of a mechanical connection between the steering wheel 18 and the steerable vehicle wheels 12 and 14 during normal operation. However, if desired, the steering apparatus 10 may have a mechanical connection between the steering wheel 18 and the steerable vehicle wheels 12 and 14 .
  • the steering apparatus 10 includes a manually rotatable steering wheel 18 which is connected with a transmitter assembly 20 .
  • the transmitter assembly 20 is connected with a receiver assembly 21 by a flexible cable 22 .
  • the transmitter assembly 20 , receiver assembly 21 and flexible cable 22 have the same construction and mode of operation as is disclosed in U.S. Pat. No. 6,655,709. However, the transmitter assembly 20 and receiver assembly 22 may be constructed and operated in the manner disclosed in U.S. Pat. No. 6,546,322 if desired.
  • the receiver assembly 21 is connected with a rack and pinion power steering mechanism 24 by a shaft assembly 26 .
  • a connector member 28 connects the rack and pinion power steering mechanism 24 to the steerable vehicle wheel 14 .
  • the connector member 28 is the only connection between the rack and pinion steering mechanism 24 and the steerable vehicle wheels 12 and 14 .
  • a force transmitting member or tie rod 32 extends between and is connected to the steerable vehicle wheels 12 and 14 .
  • the steerable vehicle wheels 12 and 14 are supported for turning movement about pivot connections or kingpins 36 and 38 ( FIG. 2 ).
  • a power steering motor 42 is connected with a frame 44 (indicated in dashed lines in FIG. 1 ) of the vehicle and with the force transmitting member 32 .
  • Pivot joints, specifically ball and socket joints 46 are provided in the force transmitting member 32 .
  • the power steering motor 42 ( FIG. 2 ) is connected with a valve assembly 50 in the rack and pinion power steering mechanism 24 by hydraulic fluid conduits 52 and 54 .
  • the valve assembly 50 is supplied with hydraulic fluid by a power steering pump (not shown) through a supply conduit 56 and is connected with a fluid reservoir through a drain conduit 58 .
  • the valve assembly 50 may have a construction similar to the construction disclosed in either U.S. Patent No. 3,709,099 or U.S. Patent No. 5,582,207.
  • the valve assembly 50 is connected with a pinion gear 62 ( FIG. 2 ).
  • the pinion gear 62 is disposed in meshing engagement with a rack 66 .
  • a right (as viewed in FIG. 2 ) end portion 70 of the rack is connected with the connector member 28 and steerable vehicle wheel 14 by a ball and socket pivot joint 71 .
  • the opposite or left (as viewed in FIG. 2 ) end portion 72 of the rack 66 is not connected to the steerable vehicle wheel 12 .
  • the end portion 72 of the rack 66 is spaced from the steerable vehicle wheel 12 and is free of connection with a member which extends between the end portion 72 of the rack and the second steerable vehicle wheel.
  • the connector member 28 which is connected to the left end portion 70 of the rack 66 and the steerable wheel 14 , has a central axis which extends parallel to the central axis of the force transmitting member 32 when the steerable vehicle wheels 12 and 14 are in the straight ahead orientation of FIGS. 1 and 2 .
  • the connector member 28 and force transmitting member 32 both extend parallel a horizontal axis 76 through the pivot connections 36 and 38 for the steerable wheels 12 and 14 when the steerable vehicle wheels 12 and 14 are in the straight ahead orientation.
  • the steerable vehicle wheels 12 and 14 are pivoted about vertical axes which extend perpendicular to and intersect the axis 76 .
  • the right (as viewed in FIG. 2 ) end portion of the connector member 28 pivots about a vertical axis extending through a pivot connection 80 between the connector member 28 and the steerable vehicle wheel 14 .
  • opposite end portions of the force transmitting member 32 pivot about vertical axes extending through pivot connections 84 and 86 which connect opposite ends of the force transmitting member 32 to the steerable vehicle wheels 12 and 14 .
  • valve assembly 50 When the vehicle having the steerable wheels 12 and 14 is proceeding in a straight ahead direction, that is, in the direction of an arrow 92 in FIGS. 1 and 2 , rotation of the steering wheel 18 results in actuation of the valve assembly 50 . Actuation of the valve assembly 50 results in relatively high fluid pressure being conducted to either a left chamber 96 or a right chamber 98 ( FIG. 2 ) of the power steering motor 42 . The opposite chamber is connected in fluid communication with a fluid reservoir.
  • the fluid pressure in the high pressure chamber for example, the left chamber 96 , is applied against a piston 102 which is connected to the force transmitting member 32 .
  • the right chamber 98 is connected with the drain conduit 58 through the valve assembly 50 .
  • the rack 66 moves toward the left (as viewed in FIG. 2 ) and rotates the pinion gear 62 .
  • the valve assembly 50 is operated to an unactuated or initial condition.
  • valve assembly 50 cooperates with the pinion gear 62 and rack 66 is well known and will not be further described herein in order to avoid prolixity of description. From the above description of the invention, those skilled in the art will perceive improvements, changes and modifications. Such improvements, changes and modifications within the skill of the art are intended to be covered by the appended claims.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Power Steering Mechanism (AREA)

Abstract

An apparatus (10) for use in turning steerable vehicle wheels (12,14) includes a connector member (28) which connects a first end portion (70) of the rack (66) with a first steerable vehicle wheel (14). A second end portion (72) of the rack (66) is spaced from the second steerable vehicle wheel (12) and is free of a connection with a member which extends between the second end portion of the rack and the second steerable vehicle wheel. A force transmitting member (32) extends between the steerable vehicle wheels (12,14) and extends through a hydraulic motor (42). Upon rotation of a steering wheel, a valve connected with a pinion gear (62) effects operation of the motor (42) to turn the steerable vehicle wheels (12,14).

Description

BACKGROUND OF THE INVENTION
The present invention relates to a new and improved apparatus for turning steerable vehicle wheels upon manual rotation of a steering wheel.
Steerable vehicle wheels have previously been turned by a rack and pinion steering system. The rack and pinion steering system may include a hydraulic motor which is connected with the steerable vehicle wheels by tie rods in the manner disclosed in U.S. Pat. No. 3,709,099. Other known rack and pinion steering systems are disclosed in U.S. Pat. Nos. 5,851,015 and 5,975,573.
Steerable vehicle wheels have also been turned by steer-by-wire steering systems. In a known steer-by-wire steering system, there has been no mechanical connection between a steering wheel and a steering apparatus connected with steerable vehicle wheels. In at least one known steer-by-wire steering system, a transmitter assembly associated with the steering wheel sends a signal to a receiver assembly associated with a steering apparatus connected with the steerable vehicle wheels. This steering apparatus is actuated in accordance with the signal received by the receiver assembly. Known steer-by-wire steering systems are disclosed in U.S. Pat. Nos. 6,546,322 and 6,655,709.
SUMMARY OF THE INVENTION
The present invention relates to a new and improved apparatus for use in turning steerable vehicle wheels upon manual rotation of a steering wheel. The apparatus includes a connector member which connects a first end portion of a rack with a first steerable vehicle wheel. A second end portion of the rack is spaced from a second steerable vehicle wheel and is free of connection with a member which extends between the second end portion of the rack and the second steerable vehicle wheel.
A force transmitting member has first and second end portions connected with the steerable vehicle wheels. A hydraulic motor is connected with the force transmitting member. Upon manual rotation of a steering wheel, a valve is actuated. The valve is connected with a pinion gear which is disposed in meshing engagement with the rack. Actuation of the valve effects operation of a hydraulic motor connected with the force transmitting member to turn the steerable vehicle wheels.
A steering apparatus constructed in accordance with the present invention may be used in a steer-by-wire steering system. However, the steering apparatus may be used in other systems. For example, a steering apparatus constructed in accordance with the present invention may be used in a steering system in which there is a mechanical connection between the steering wheel and the steering apparatus.
BRIEF DESCRIPTION OF THE DRAWINGS
The foregoing and other features of the present invention will become more apparent upon a consideration of the following description taken in connection with the accompanying drawings wherein:
FIG. 1 is a schematic pictorial illustration of a portion of a vehicle having a steering apparatus constructed in accordance with the present invention; and
FIG. 2 is a schematic top plan view of the steering apparatus of FIG. 1.
 DESCRIPTION OF ONE SPECIFIC PREFERRED EMBODIMENT OF THE INVENTION
A steering apparatus 10 (FIGS. 1 and 2) is operable to turn steerable front wheels 12 and 14 of a vehicle. The illustrated steering apparatus 10 is a steer-by-wire steering system. Therefore, the steering apparatus 10 is free of a mechanical connection between the steering wheel 18 and the steerable vehicle wheels 12 and 14 during normal operation. However, if desired, the steering apparatus 10 may have a mechanical connection between the steering wheel 18 and the steerable vehicle wheels 12 and 14.
The steering apparatus 10 includes a manually rotatable steering wheel 18 which is connected with a transmitter assembly 20. The transmitter assembly 20 is connected with a receiver assembly 21 by a flexible cable 22. The transmitter assembly 20, receiver assembly 21 and flexible cable 22 have the same construction and mode of operation as is disclosed in U.S. Pat. No. 6,655,709. However, the transmitter assembly 20 and receiver assembly 22 may be constructed and operated in the manner disclosed in U.S. Pat. No. 6,546,322 if desired.
The receiver assembly 21 is connected with a rack and pinion power steering mechanism 24 by a shaft assembly 26. A connector member 28 connects the rack and pinion power steering mechanism 24 to the steerable vehicle wheel 14. The connector member 28 is the only connection between the rack and pinion steering mechanism 24 and the steerable vehicle wheels 12 and 14.
A force transmitting member or tie rod 32 extends between and is connected to the steerable vehicle wheels 12 and 14. The steerable vehicle wheels 12 and 14 are supported for turning movement about pivot connections or kingpins 36 and 38 (FIG. 2). A power steering motor 42 is connected with a frame 44 (indicated in dashed lines in FIG. 1) of the vehicle and with the force transmitting member 32. Pivot joints, specifically ball and socket joints 46, are provided in the force transmitting member 32.
The power steering motor 42 (FIG. 2) is connected with a valve assembly 50 in the rack and pinion power steering mechanism 24 by hydraulic fluid conduits 52 and 54. The valve assembly 50 is supplied with hydraulic fluid by a power steering pump (not shown) through a supply conduit 56 and is connected with a fluid reservoir through a drain conduit 58. The valve assembly 50 may have a construction similar to the construction disclosed in either U.S. Patent No. 3,709,099 or U.S. Patent No. 5,582,207.
The valve assembly 50 is connected with a pinion gear 62 (FIG. 2). The pinion gear 62 is disposed in meshing engagement with a rack 66. A right (as viewed in FIG. 2) end portion 70 of the rack is connected with the connector member 28 and steerable vehicle wheel 14 by a ball and socket pivot joint 71. The opposite or left (as viewed in FIG. 2) end portion 72 of the rack 66 is not connected to the steerable vehicle wheel 12. Thus, the end portion 72 of the rack 66 is spaced from the steerable vehicle wheel 12 and is free of connection with a member which extends between the end portion 72 of the rack and the second steerable vehicle wheel.
The connector member 28, which is connected to the left end portion 70 of the rack 66 and the steerable wheel 14, has a central axis which extends parallel to the central axis of the force transmitting member 32 when the steerable vehicle wheels 12 and 14 are in the straight ahead orientation of FIGS. 1 and 2. The connector member 28 and force transmitting member 32 both extend parallel a horizontal axis 76 through the pivot connections 36 and 38 for the steerable wheels 12 and 14 when the steerable vehicle wheels 12 and 14 are in the straight ahead orientation.
Upon operation of the steering apparatus 10, the steerable vehicle wheels 12 and 14 are pivoted about vertical axes which extend perpendicular to and intersect the axis 76. As this occurs, the right (as viewed in FIG. 2) end portion of the connector member 28 pivots about a vertical axis extending through a pivot connection 80 between the connector member 28 and the steerable vehicle wheel 14. At the same time, opposite end portions of the force transmitting member 32 pivot about vertical axes extending through pivot connections 84 and 86 which connect opposite ends of the force transmitting member 32 to the steerable vehicle wheels 12 and 14.
When the vehicle having the steerable wheels 12 and 14 is proceeding in a straight ahead direction, that is, in the direction of an arrow 92 in FIGS. 1 and 2, rotation of the steering wheel 18 results in actuation of the valve assembly 50. Actuation of the valve assembly 50 results in relatively high fluid pressure being conducted to either a left chamber 96 or a right chamber 98 (FIG. 2) of the power steering motor 42. The opposite chamber is connected in fluid communication with a fluid reservoir.
The fluid pressure in the high pressure chamber, for example, the left chamber 96, is applied against a piston 102 which is connected to the force transmitting member 32. At the same time, the right chamber 98 is connected with the drain conduit 58 through the valve assembly 50. This results in the steerable wheels 12 and 14 of the vehicle being turned toward the left, that is, in a counterclockwise direction, about the pivot connections 36 and 38. As the vehicle wheels 12 and 14 are turned, the rack 66 moves toward the left (as viewed in FIG. 2) and rotates the pinion gear 62. When the steerable vehicle wheels 12 and 14 have been turned to an extent corresponding to the extent of rotation of the steering wheel 18, the valve assembly 50 is operated to an unactuated or initial condition.
The manner in which the valve assembly 50 cooperates with the pinion gear 62 and rack 66 is well known and will not be further described herein in order to avoid prolixity of description. From the above description of the invention, those skilled in the art will perceive improvements, changes and modifications. Such improvements, changes and modifications within the skill of the art are intended to be covered by the appended claims.

Claims (7)

1. An apparatus for use in turning first and second steerable vehicle wheels upon manual rotation of a steering wheel, said apparatus comprising:
a rack having first and second end portions,
a pinion disposed in meshing engagement with said rack, said pinion being connected with the steering wheel and being rotatable relative to said rack upon rotation of the steering wheel;
a valve connected with said pinion, said valve being actuatable upon rotation of the steering wheel;
a force transmitting member having a first end portion connected to the first steerable vehicle wheel and a second end portion connected to the second steerable vehicle wheel;
a hydraulic motor connected with said force transmitting member, said hydraulic motor being connected in fluid communication with said valve,
said valve being operable upon rotation of the steering wheel in a first direction to effect operation of said hydraulic motor and turning movement of the steerable vehicle wheels in a first direction, said valve being operable upon rotation of the steering wheel in a second direction to effect operation of said hydraulic motor and turning movement of the steerable vehicle wheels in a second direction, and
a connector member which connects said first end portion of said rack with the first steerable vehicle wheel, said second end portion of said rack being spaced from the second steerable vehicle wheel and disconnected from the second steerable vehicle wheel, said force transmitting member is spaced from and has a longitudinal central axis which is generally parallel to a longitudinal central axis of said connector member.
2. An apparatus as set forth in claim 1 wherein said apparatus is a steer-by-wire steering system which is normally free of a mechanical connection between the steering wheel and the first and second steerable vehicle wheels.
3. An apparatus as set forth in claim 1 wherein said motor includes a piston disposed within a cylinder, said cylinder being disposed in a coaxial relationship with said force transmitting member.
4. An apparatus as defined in claim 1 wherein said second end of said rack is free of a connection with a member which extends between said second end portion of said rack and said second steerable vehicle wheel.
5. An apparatus for use in turning first and second steerable vehicle wheels upon manual rotation of a steering wheel, said apparatus comprising:
a rack having first and second end portions,
a pinion disposed in meshing engagement with said rack, said pinion being connected with the steering wheel and being rotatable relative to said rack upon rotation of the steering wheel;
a valve connected with said pinion, said valve being actuatable upon rotation of the steering wheel;
a force transmitting member having a first end portion connected to the first steerable vehicle wheel and a second end portion connected to the second steerable vehicle wheel;
a hydraulic motor connected with said force transmitting member, said hydraulic motor being connected in fluid communication with said valve,
said valve being operable upon rotation of the steering wheel in a first direction to effect operation of said hydraulic motor and turning movement of the steerable vehicle wheels in a first direction, said valve being operable upon rotation of the steering wheel in a second direction to effect operation of said hydraulic motor and turning movement of the steerable vehicle wheels in a second direction, and
a connector member which connects said first end portion of said rack with the first steerable vehicle wheel, said second end portion of said rack being spaced from the second steerable vehicle wheel and disconnected from the second steerable vehicle wheel, said connector member is spaced from said force transmitting member and has a first end portion connected to said first end portion of said rack and a second end portion which is connected to the first steerable vehicle wheel, said connector member has a longitudinal central axis which extends through the first steerable vehicle wheel at a location spaced from a location where said first end portion of said force transmitting member is connected to the first steerable vehicle wheel.
6. An apparatus as set forth in claim 5 wherein said apparatus is a steer-by-wire steering system which is normally free of a mechanical connection between the steering wheel and the first and second steerable vehicle wheels.
7. An apparatus as set forth in claim 5 wherein said motor includes a piston disposed within a cylinder, said cylinder being disposed in a coaxial relationship with said force transmitting member and has a longitudinal central axis which is generally parallel to the longitudinal central axis of said connector member.
US11/077,457 2005-03-10 2005-03-10 Steering apparatus Expired - Fee Related US7210553B2 (en)

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US20060219468A1 (en) * 2005-03-31 2006-10-05 Shuji Shin Power steering apparatus
US20070163833A1 (en) * 2004-02-12 2007-07-19 Walter Kogel Steering system for a vehicle
US20080257634A1 (en) * 2004-02-18 2008-10-23 Walter Kogel Hydraulic Power Steering System
US20100224434A1 (en) * 2009-03-06 2010-09-09 Perry Francine J Steering Assist For A Rear Caster Wheel On A Work Machine
US9776658B2 (en) 2012-11-01 2017-10-03 Trw Automotive U.S. Llc Apparatus for turning steerable vehicle wheels

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DE202004001740U1 (en) * 2004-02-05 2004-06-09 Trw Automotive Gmbh Rack and pinion steering, especially for lighter trucks
DE102014201573A1 (en) * 2013-03-01 2014-09-04 Ford Global Technologles, LLC Front axle for vehicle, has steering rack and rack that are functionally coupled to each other
DE102013220921A1 (en) * 2013-10-16 2015-04-16 Zf Friedrichshafen Ag Steering angle device for a motor vehicle
CN108349530B (en) * 2015-10-23 2020-09-22 本田技研工业株式会社 Tie rod joint
CN110914137A (en) * 2017-05-12 2020-03-24 Zf主动安全与电子美国有限责任公司 Device for turning steerable wheels
WO2019164879A1 (en) * 2018-02-20 2019-08-29 Trw Automotive U.S. Llc Electric power steering system of a rack and pinion type for a vehicle and method for producing the same
JP7317695B2 (en) * 2019-12-26 2023-07-31 トヨタ自動車株式会社 steering device

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US6868935B2 (en) * 2000-09-13 2005-03-22 Volvo Lastvagnar Gb Arrangement and method for operating self-steering wheels
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US3709099A (en) 1970-08-11 1973-01-09 Trw Inc Convertible rack and pinion steering gear
US3944015A (en) * 1973-10-26 1976-03-16 Bishop Arthur E Rack and pinion steering gear
US4016949A (en) * 1975-11-24 1977-04-12 Allis-Chalmers Corporation Hydrostatic load sensitive regenerative steering system
US4172507A (en) * 1977-03-09 1979-10-30 Adwest Engineering Limited Power-assisted rack-and-pinion steering mechanisms
US4137989A (en) * 1977-10-11 1979-02-06 General Motors Corporation Rotary hydraulic servo for steering gear
US4492283A (en) * 1981-05-12 1985-01-08 Valeo Power-assisted steering device for motor vehicles
US4522419A (en) * 1982-03-31 1985-06-11 Nissan Motor Company, Limited Rack and pinion type steering device
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US4463557A (en) * 1983-08-12 1984-08-07 Deere & Company Open center hydraulic system
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US4838106A (en) * 1986-11-28 1989-06-13 Trw Cam Gears Limited Power assistance means for a steering gear and a steering gear assembly which includes such means
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US6868935B2 (en) * 2000-09-13 2005-03-22 Volvo Lastvagnar Gb Arrangement and method for operating self-steering wheels
US6879118B2 (en) * 2001-02-06 2005-04-12 Robert Bosch Gmbh Method for position regulation of an electric drive and for steering a motor vehicle by means of a steer-by-wire system
US6546322B2 (en) 2001-07-11 2003-04-08 Trw Inc. Method of controlling a vehicle steering apparatus
US6655709B2 (en) 2002-01-29 2003-12-02 Trw Inc. Steer-by-wire steering apparatus with actuatable mechanism

Cited By (7)

* Cited by examiner, † Cited by third party
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US20070163833A1 (en) * 2004-02-12 2007-07-19 Walter Kogel Steering system for a vehicle
US20080257634A1 (en) * 2004-02-18 2008-10-23 Walter Kogel Hydraulic Power Steering System
US7942230B2 (en) * 2004-02-18 2011-05-17 Zf Lenksysteme Gmbh Hydraulic power steering system
US20060219468A1 (en) * 2005-03-31 2006-10-05 Shuji Shin Power steering apparatus
US20100224434A1 (en) * 2009-03-06 2010-09-09 Perry Francine J Steering Assist For A Rear Caster Wheel On A Work Machine
US7918304B2 (en) * 2009-03-06 2011-04-05 Deere & Company Steering assist for a rear caster wheel on a work machine
US9776658B2 (en) 2012-11-01 2017-10-03 Trw Automotive U.S. Llc Apparatus for turning steerable vehicle wheels

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US20060201735A1 (en) 2006-09-14

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